﻿#region Copyright (c) 2003 - 2008, Andreas Mueller
/////////////////////////////////////////////////////////////////////////////////////////
// 
// Copyright (c) 2003 - 2008, Andreas Mueller.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
//    Andreas Mueller - initial API and implementation
//
// 
// This software is derived from software bearing the following
// restrictions:
// 
// Copyright (c) 1994
// Hewlett-Packard Company
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Hewlett-Packard Company makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// Copyright (c) 1996,1997
// Silicon Graphics Computer Systems, Inc.
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Silicon Graphics makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// (C) Copyright Nicolai M. Josuttis 1999.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// 
/////////////////////////////////////////////////////////////////////////////////////////
#endregion


using System.Collections;
using NUnit.Framework;

namespace NStl.NUnit.Support
{
    /// <summary>
    /// Base class for testing an <see cref="ICollection"/> implementation.
    /// </summary>
    public abstract class CollectionFixture : EnumerableFixture
    {
        private ICollection Collection
        {
            get { return (ICollection)Enumerable; }
        }
        /// <summary>
        /// When overriden, it must create the collection.
        /// </summary>
        /// <returns></returns>
        protected abstract ICollection CreateCollection();
        protected sealed override IEnumerable CreateEnumerable()
        {
            return CreateCollection();
        }
        [Test]
        public void CopyTo()
        {
            object[] target = new object[Collection.Count];
            Collection.CopyTo(target, 0);
            CollectionAssert.AreEqual(target, Collection);
        }
        [Test]
        public void CopyToWithOffset()
        {
            int offset = 5;

            object[] target = new object[Collection.Count + offset];

            Collection.CopyTo(target, offset);
            CollectionAssert.IsSubsetOf(Collection, target);
            Assert.AreEqual(target[target.Length - 1], LastOfCollection(Collection));
        }
        private static object LastOfCollection(IEnumerable enumerable)
        {
            IEnumerator e = enumerable.GetEnumerator();
            object current = null;
            while(e.MoveNext())
                current = e.Current;

            return current;
        }
        

        [Test]
        public void Count()
        {
            int count = 0;
            IEnumerator e = Collection.GetEnumerator();
            while (e.MoveNext())
                ++count;
            Assert.AreEqual(count, Collection.Count);
        }
        [Test]
        public void SyncRoot()
        {
            bool b = Collection.IsSynchronized;
            Assert.IsNotNull(Collection.SyncRoot);
        }
        
    }
}
